1. Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
2. Department of Gastroenterology and Hepatology, Essen University Hospital, Essen, Germany
3. Division of Gastroenterology & Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
4. Department of Internal Medicine I, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
5. Department of Medicine II, University Hospital of the Ludwig-Maximilians-University Munich, Munich, Germany
6. Institute of Diagnostic and Interventional Radiology and Neuroradiology, Faculty of Medicine, Essen University Hospital, Essen, Germany
7. Department of Medicine I, University Hospital Schleswig-Holstein, Lübeck, Germany
8. Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany